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| HAL : in2p3-00635065, version 1 |
| arXiv : 1110.3243 |
| Fiche détaillée |  Récupérer au format |
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| 2nd International Particle Accelerator Conference (IPAC'11), San Sebastian : Espagne (2011) |
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| High flux polarized gamma rays production: first measurements with a four-mirror cavity at the ATF |
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| (2011) |
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| The next generation of e+/e- colliders will require a very intense flux of gamma rays to allow high current polarized positrons to be produced. This can be achieved by converting polarized high energy photons in polarized pairs into a target. In that context, an optical system consisting of a laser and a four-mirror passive Fabry-Perot cavity has recently been installed at the Accelerator Test Facility (ATF) at KEK to produce a high flux of polarized gamma rays by inverse Compton scattering. In this contribution, we describe the experimental system and present preliminary results. An ultra-stable four-mirror non planar geometry has been implemented to ensure the polarization of the gamma rays produced. A fiber amplifier is used to inject about 10W in the high finesse cavity with a gain of 1000. A digital feedback system is used to keep the cavity at the length required for the optimal power enhancement. Preliminary measurements show that a flux of about $4\times10^6 \gamma$/s with an average energy of about 24 MeV was generated. Several upgrades currently in progress are also described. |
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| ThomX |
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| Thème(s) | : | Physique/Physique/Physique des accélérateurs |
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| ThomX |
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| Lien vers le texte intégral : |
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| http://fr.arXiv.org/abs/1110.3243 |
| in2p3-00635065, version 1 | |
| http://hal.in2p3.fr/in2p3-00635065 | |
| oai:hal.in2p3.fr:in2p3-00635065 | |
| Contributeur : Françoise Marechal | |
| Soumis le : Vendredi 27 Juillet 2012, 15:12:54 | |
| Dernière modification le : Lundi 7 Janvier 2013, 11:44:50 | |
